What is x when 87 divided by x equals 17?

To find the answer, just divide the dividend by the quotient: 87 ÷ 17 = 5.1176470588235

To prove this, let's compute 87 divided by 5.1176470588235: $\frac{87}{5.1176470588235} = 17$

How does it work?

Asking what the value of x could be when 87 divided by x gives a result of 17, is equivalent to solving the following equation:

$\frac{87}{x} = 17$

Multiply both sides by x: $\frac{87 x}{x} = 17 x$
$\frac{87 x}{x}$ is equivalent to $\frac{x}{x} \times 87$ , which simplifies to $1 \times 87$ (or just $87$ ).
Thus, the equation becomes: $87 = 17 x$
To find x, divide both sides by 17: $\frac{87}{17} = \frac{17 x}{17}$
Which gives, after simplification: $5.1176470588235 = x$ (or $x = 5.1176470588235$ )

So, if the dividend is 87 and the quotient is 17, the divisor is 5.1176470588235.